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Borrowings Subordinated Debentures (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2018 | May 01, 2018 | Dec. 31, 2017 | Sep. 08, 2016 | Apr. 26, 2006 | Feb. 27, 2004
Debt Instrument [Line Items] |  |  |  |  |  |
Junior subordinated debentures | $ 29,000 |  | $ 24,000 |  |  |
FMIS Trust I [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Trust preferred securities issued |  |  |  |  |  | $ 10,000
Investment in Statutory Trust |  |  |  |  |  | $ 310
Junior subordinated debentures | 10,310 |  |  |  |  |
FMIS Trust II [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Trust preferred securities issued |  |  |  |  | $ 10,000 |
Investment in Statutory Trust |  |  |  |  | $ 310 |
Junior subordinated debentures | $ 10,310 |  |  |  |  |
CLS Trust I [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Trust preferred securities issued |  |  |  | $ 4,000 |  |
Investment in Statutory Trust |  |  |  | $ 124 |  |
FBTCST I [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Trust preferred securities issued |  | $ 6,000 |  |  |  |
Investment in Statutory Trust |  | $ 186 |  |  |  |
Junior Subordinated Debt [Member] | FMIS Trust I [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate Terms | three-month London Interbank Offered Rate (“LIBOR”) plus 280 basis points |  |  |  |  |
Debt Instrument, Interest Rate at Period End | 5.19% |  | 4.21% |  |  |
Junior Subordinated Debt [Member] | FMIS Trust II [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate Terms | bore interest at a fixed rate of 6.98% paid quarterly until June 15, 2011 and then converted to floating rate (LIBOR plus 160 basis points) after June 15, 2011 |  |  |  |  |
Debt Instrument, Interest Rate at Period End | 4.388% |  | 3.19% |  |  |
Junior Subordinated Debt [Member] | CLS Trust I [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate Terms | bear interest at three-month LIBOR plus 185 basis points |  |  |  |  |
Debt Instrument, Interest Rate at Period End | 4.638% |  | 3.438% |  |  |
Junior Subordinated Debt [Member] | FBTCST I [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate Terms | bear interest at three-month LIBOR plus 170 basis points |  |  |  |  |
Debt Instrument, Interest Rate at Period End | 4.488% |  | 3.29% |  |  |

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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